By: Dawson B.

A mountain made up mostly of rock layers folded by being squeezed together.

A mountain made by huge tilted blocks of rocks separated by faults.

The breaking down of rocks by a natural prosess.

The picking up and removal of rock particles.

A mixture of weathered rock, decayed plant, and animal matter.

Material in soil formed by plant and animal material.

Any of the layers of soil from surface to bedrock.

Water that soaks into the soil and rock by collecting in spaces between rock particles.

The downhill movements of earth material caused by gravity.

The dropping off of sediment.

A huge sheet of ice and snow that moves slowly over the land.

A jumble of many sizes of sediment deposited by a glacier.

A deposit of many sizes of sediment in front or along the sides of a glacier.

A naturally occurring solid in earths crust.

A rock that forms when hot liquid lava cools and hardens.

A rock that forms when other rocks are squeezed together.

A rock that is formed when another rock is changed by heat and pressure.

Rocks continually changing from one kind to another.

The idea that the bottom rock layer is the oldest and the top is the youngest.

The age of a rock as compared with another rock.

A listing of earths rock layers from oldest to youngest.

Any trace, imprint, or remains of a living thing preserved in earths crust.

The remains of a thing that lived for only a short part of earths history.

The time that it takes a radioactive mass to break down.

The age of a rock in years.

One of the four long stretches in earths history.